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      1 /*
      2  * INET		An implementation of the TCP/IP protocol suite for the LINUX
      3  *		operating system.  INET is implemented using the  BSD Socket
      4  *		interface as the means of communication with the user level.
      5  *
      6  *		Definitions for the UDP protocol.
      7  *
      8  * Version:	@(#)udp.h	1.0.2	04/28/93
      9  *
     10  * Author:	Fred N. van Kempen, <waltje (at) uWalt.NL.Mugnet.ORG>
     11  *
     12  *		This program is free software; you can redistribute it and/or
     13  *		modify it under the terms of the GNU General Public License
     14  *		as published by the Free Software Foundation; either version
     15  *		2 of the License, or (at your option) any later version.
     16  */
     17 #ifndef _LINUX_UDP_H
     18 #define _LINUX_UDP_H
     19 
     20 #include <linux/types.h>
     21 
     22 struct udphdr {
     23 	__be16	source;
     24 	__be16	dest;
     25 	__be16	len;
     26 	__sum16	check;
     27 };
     28 
     29 
     30 /* UDP socket options */
     31 #define UDP_CORK	1	/* Never send partially complete segments */
     32 #define UDP_ENCAP	100	/* Set the socket to accept encapsulated packets */
     33 
     34 /* UDP encapsulation types */
     35 #define UDP_ENCAP_ESPINUDP_NON_IKE	1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
     36 #define UDP_ENCAP_ESPINUDP	2 /* draft-ietf-ipsec-udp-encaps-06 */
     37 #define UDP_ENCAP_L2TPINUDP	3 /* rfc2661 */
     38 
     39 
     40 #endif	/* _LINUX_UDP_H */
     41